import java.util.Scanner;

public class CoordinateGeometry $\{$

public static void main$($String$[]$ args$)\{$

Scanner scnr $=$ new Scanner$($System$.$in$)$;

double x$1$;

double y$1$;

double x$2$;

double y$2$;

double pointsDistance;

double xDist;

double yDist;

pointsDistance $=0\mathrm{.}0$;

xDist $=0\mathrm{.}0$;

yDist $=0\mathrm{.}0$;